.github/actions/java-format-check/action.yml

name: 'Java Format Check'
description: 'Check Java files formatting using google-java-format (Ubuntu/Linux runners only)'

inputs:
  version:
    description: 'The version of google-java-format to use. Use without the initial "v".'
    required: false
    default: '1.28.0'
  working-directory:
    description: 'The directory to search for Java files (relative to repository root)'
    required: true
  exclude-path:
    description: 'A path pattern to exclude from the search (passed to find -not -path)'
    required: false
    default: ''

runs:
  using: 'composite'
  steps:
    - name: Run google-java-format
      if: runner.os == 'Linux'
      shell: bash
      run: |
        GJF_VERSION="${{ inputs.version }}"
        WORKING_DIR="${{ inputs.working-directory }}"
        EXCLUDE_PATH="${{ inputs.exclude-path }}"
        
        echo "Downloading google-java-format v${GJF_VERSION}..."
        curl -L -s -o google-java-format.jar "https://github.com/google/google-java-format/releases/download/v${GJF_VERSION}/google-java-format-${GJF_VERSION}-all-deps.jar"
        
        echo "Finding all .java files in ${WORKING_DIR}..."
        FIND_CMD="find \"${WORKING_DIR}\" -type f -name \"*.java\" -not -path \"./.git/*\""
        if [ -n "$EXCLUDE_PATH" ]; then
          echo "  excluding ${EXCLUDE_PATH}"
          FIND_CMD="${FIND_CMD} -not -path \"${EXCLUDE_PATH}\""
        fi

        java_files=$(eval $FIND_CMD)
        
        if [ -z "$java_files" ]; then
          echo "No Java files found in ${WORKING_DIR}"
          exit 0
        fi
        
        echo "Found $(echo "$java_files" | wc -l) Java files to check"

        non_compliant_files=$(echo "$java_files" | xargs java -jar google-java-format.jar -n)
        
        if [ -n "$non_compliant_files" ]; then
          echo "❌ The following Java files are not formatted correctly:"
          echo "$non_compliant_files"
          echo ""
          echo "To fix formatting issues, run:"
          echo "$FIND_CMD | xargs java -jar google-java-format.jar --replace"
          exit 1
        else
          echo "✅ All Java files are properly formatted."
        fi
    
    - name: Unsupported OS
      if: runner.os != 'Linux'
      shell: bash
      run: |
        echo "❌ This action only supports Linux runners"
        echo "Please use a Linux runner to run this action."
        exit 1

branding:
  icon: 'check-circle'
  color: 'green'